Before indexable cutting tools for roughing generally equipped with circular blade, the surface seems to get a great amount of depth of cut, cut a lot of material at once, but because of the length of the cutting edge in contact with the material to be processed is more than straight edge contact length of the blade, so the cutting resistance increases, it is difficult to achieve high feed cutting. In addition, the circular blade in the tool overhang longer processing applications by radial force, could easily lead to tool bending vibrations occur. Multi-blade type large feed rounded end mill cutting edge design at the bottom of the tool rotation axis, thus cutting resistance a major role in the axial direction, namely multi-blade-type high-feed milling cutter rounded overhang even longer is not easy flutter, to achieve a stable process. Meanwhile, the miniaturization of the blade, the cutting edge length than the previous high-feed tool significantly reduced, reducing the cutting resistance, thereby cutting edge technology through more effective control of the cutting force.